Carbureter.



IE. NCE.

GARBURETBH.

APPLwATloN Mmm nov. 25, 1912.

l ,084,954. Fati-med Jan, 2U, 1914.

Z SHIBTBwSHEET l.

E. NICE.

CARBURETER.

APPLICATION FILED Nov.26,1912.

1 ,084,954. Patented Jan. 20, 1914.

2 SHBETS-SHEET 2.

' -of an'internal combustion engine.

Emma NICE, or PHILADELPHIA, PENNSYLVANIA.

caascaam.

Specification ofA Letters Patent;

Patented Jan. 20, 1914.

' Application filed November 26, 1912. Serial No. 733,578'.

To all whom 'it may concern.'

Bc it known that I, Emma NICE, a citi- Zen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inCarburetersof which the following is a specification.

My invention relates to, improvements in carbureters, the object of theinvention being to provide an improved. mechanism which automaticallyand simultaneously controls the proportion of liquid and air, andfacilitates the commingling of the air anld vapor, so that? a goodmixture is theresu t.

A further object is to provide a carbureter with a. plurality of airpassages directing the air into contact with' the liquid or vapor, andprovide a movable nembei" which simultaneously controls the flow of airthrough the. passages and also controls the feed of liquid fuel.

A further object is to provide a carbureter of this character in whichthere is no poslsibility of back tire reaching the liquid fue A furtherObjectis to provide a carbureter of this character which will be ofextremely simpleinexpensive construction, .strong'and durable in use.

With these and other objects in view, the invention consists in certainnovel features of construction and emnbinations and arrangements ofparts as will be more fully hereinafter described and pointed out in theclaims.

In the accompanying drawings: Figure 1 is a view in longitudinal sectionillustrating my improvements. Fig. 2 is a perspective view of one of thedisks 15. Fig. 3 is a view in' cross section on the line 3-3 of Fig. 1.Fig. 4- is a \'ie\v in horizontal section on the line 4-4 of Fig. 1.Fig. 5 is asimilar View in section n the line 5 5 of Fig. 1, and Fig. 6is a fragmentaryvview in section on the line (5 6 of Fig. 4.

1 represents the cylindrical casing of my improved carbureter, having abottom 2 secured to the lower end of the casing and a top 3 to t-heupper end of the casing. The top 3 is integral with an outlet tube 4having an ordinary throttle valve 5 therein, and adapted to be connectedto the intake h depending. cylinder 6 is fixed Vtothe top 3 in anyapproved' manneris concentric with the wall o casing 1, and is providedat opposite sides wit longitudinal slots 7 through which a bar 8projects. This bar r8, atits ends, is secured to an annular piston 9,and between its ends is secured a rod10.

The rod 10 is guided in its vertical movenzent by means of a `transversebar 11 secured in tube 4, and this upper portion of the rod isscrew-threaded for the reception of nuts 12 located'l at' opposite sidesof bar 8, and securing'the bar and rod together. A coiled spring -13 ispreferably located aroundl the rod-between bars 1 1 andl 8, and erertsalight' downward pressure upon the piston 9. tra] y on its upper face acircular 'boss 14 having its 'outer wall in line with the outer wall ofcylinde'r, it being understood that the lower end of cylinder 6terminates an appreciable distance above the boss 14.

BetweenV the 'boss 14 and the lower end of the cylinder 6, a pluralityof disks 15 are located. These disks are of an external diameter, thesame as the external dia-meter of cylinder 6 andboss 14, so that thepiston 9 is free to movevertically and is-of an internal diameter justsuicient to snugly fit the cylinder 6, the disks 15, and the boss 14.Vhile this-piston may be variously constructed, it is preferably formedwith a depending flange 16 which operates to cut oif the spaces betweenthe several disks 15. These disks 15 are spaced apart as indicated. Thatis to say, the lower disks are closer togther than the upper disks, andthe spaces between the disks gradually increase from the lowest disktothe highest disk.

\Vl1ile, of course. various means may be resorted to for spacing thedisks, I preferably position blocks 32 between the disks, and thenprojectv bolts 33 through all of the blocks and througl'ilugsfl oncylinder 6, and screw the lower ends of these bolts into the boss 14..This construction' is clearly illustrated in Fig. 6. Each disk has anopen center,` and'around the opencenter, the disk is provided with abeveled annular The bottom 2 has formed cenflange 17, each successivedisk in the series4 105 havinga larger opening and a consequent largerfiange. In other words, the smallest disk has the smallest opening, andfla e, and each successive disk above has a're atively larger openingand ange, so that at exactly suit conditions.

vided at one Side with an air inlet 24, and

its lower end forming a needle valve 158 which controls the ow of liquidfuel from a supply tubc 19 projecting into the center of the boss 14.This supply tube lflis externally screw-threaded to mesh with internalthreads in a nut 20. The nut 20 has rotary mounting in a plate 2l,secured t0 the bottom `2 by screws 22, and a hand wheel 23 is fixed tothe nut 20, so that when the latter is turned, the tube 19 will beadjusted vertically to time the cut off of -l iquid.fuel to Casing 1 isprowhile this inlet at its outer end is circular to fit n n-ordinarypipe, it gradually changes in form to that of an ellipse as shown at 25,so as to` give the maximum of air inlet space to the casing. In the top3, a lurality of lvalves 26 normally close ports 2i) in the top `of thecasing', and the stems 29 of said valves are mounted to move in lugs 30on tube 4, and are held in' closed position by coiled springs 31. It isof course to be understood that the piston 9 lits the casing 1 as wellas cylinder 6,'but -said listona't lts outer edge is formed with -a lreatively small ange 35 as compared with the -llange 16.

In Fig, 1 the parts are shown in partially open position, theliquid'fuel being drawn through the pipe 19, and the air sucked throughthe space between the lower disks As the suction increases, thepistonwvill be drawnupwardly and at the same tiibs will enlargetheliquid fuel outlet and al the -air inlet. By reason of the'constructionand arrangement ofdisks, it will be seen that ai will flow in alldirections from the outside 0%A the disks to the center thereof, and byrea.` son of the flanges 17 t-his air will be directed upwardly in"thedirection of the movement of the gas. An increased suction, therefore,increases the amount ,of airover that of liquid fuel. In other words,asthe suction increases, the relati\'e proportion of air over liquidincreases. This is due to the increased spaces between the several disks15. As the suction diminishes, the piston will fall and gradually cutoffthe air and then' the liquid. It will be noted that the air will be cutoff before the liquid, and-on the reverse movement the liquid supplywill be opened slightly ahead of the air, so that the first mixture isrich and' gradually becomes' poorer in proportion to the suction. Incase of back fire, the gases will escape through the ports 27, valves 26opening'to';I permit such escape and prevent any possibilit-y of backlire reachingthe liquid fuel. lVhilc I- uSe the term liquid fuel I wouldhave :it understood that my carbureter is especially adapted for usewith gasolene and Asimilar highly volatile liquids such as commonly usedin connection with internal combustion .engines 5 f The several lpart-sare capable of a wide liegen range of adjust-ment in accordance with themixture desired, and various slight changes mig'ht be made in thegeneral form and arrangement of parts described without departing frommy invention', and hence I do not limit myself to the precise detallsset forth, but consider myself atliberty to rri'akcv such changes andalterations as fairly fall 'within the spiritand scope of the appendedclaims.

Having thus described my invention, what I claim as new and desire -tosecure byLetters Patent is: y

ing a depending wall terminating short of the bottom ofthe casing andforming un annular piston chamber around the wall, means below the Wallfor directing air into the chamber formed in the interior thereof, apiston' around the 'wa-ll movable` relative thereto, said piston adaptedto control the flow of air below the'lower end of the wall,

and means .connected to the pist-on cont-roh ling the flow of liquid toth'e space iuclosed by the wall, substantiallyas described.

2. A carburet'er comprising a casing hav the bottom ofthe casing andforming an annular piston chamber around the wall, means below the wallfor directing air into the chamber formed in the interior thereof, apiston -around the wall movable relative thereto, said piston adapted tocontrol the flow of air below the lower end of the wall,

a liquid supply tube discharging liquid into the lower end of thecasing, and a needle yalve carried by the piston and controllingthe'outlet from said supply tube, substantially' as described. l

3. A carbureter comprising ay cylindrical Casing, a concentric cylinderin the casing mg a depending wall terminating short o 1. A carburetercomprising a casing` havformingr an annular chamber between: the

forming an annular chamber between the?f i cylinder and the wall of thecasing, a plurality. of disks below the cylinder spaced Aapart and,communicating with the casing, said casing having an air inlet` a.piston lil.-

tiug the annular chamber and adapted to cut oft' the space `between thedisks, said disks having central openings and inclined upwardlyprojecting flanges around said openings, `substantially as described.

5., A carbureter comprising a cylindrical casigfagconcentric cylinder inthe casing forming an annular chamber -lletwec'n thev cylinder and thewall of the casing, a plui largest spaces between the upper disks,substantially as described.

6. A carbureter comprising a cylindrical casing, a concentric cylinderin 'the casing forming an annular chamber between the cylinder and thewall of the easing, a plurality of disks below thecylinder spaced .apartand communicating with the casing,

said casing having an air inlet, a piston fit` ting the annularchamberand adapted to eut ofi' the space between the disks, said diskshaving central openings and inclined upwardly projecting flanges aroundsaid openings, the, openingl in the lowest disk being smallest and inthe upper disk largest,

. and the openings in the disks between the upper and the lower disksvarying in size in regular ratio, Substantially as described. 7. Acarbureter comprising a cylindrical easing, a vconcentric cylinder inthe casing` forming an annular chamber between the cylinder and the wallof the casing, a plurality of disks below the cylinder apart andcommunicating with the casing, said casing having an air inlet, a pistontitting the annular chamber and adapted to cut off the spacebet-ween thedisks, said disks having central openings and inclined upwardlyprojecting flanges around said openings. the lowermost disks closesttogether, and the disks above spaced from those below by increasilneramounts. the smallest spaces being between the lower disks and thelargest. spaces between the upper disks, the opening in the lowest diskbeing smallest and in the upper disk largest, and the openings inI thedisks between the upper and the lower disks varying in size in regularratio. substantially as described.

8. A carbnreter comprising a rvlind'rical casing, a concentric c vlinderin the casing forming an annul'ar chamber between thc cylinder and thewall of the casing. a pluralitv of disks below the cylinder spaced apartand conunuuicating with the casing. said casing having` an air inlet. apiston litting the annular chamber and adapted to cnt ott' the spacebetween the disks. a liquid supply pipe communicating with the center ofthe lower-most disk. and a needle valve carried bv the piston andcontrollinghe outlet from said liquid supply pipe. substan tially asdescribed.

9. .i carbureter comprising a cylindrical spaced casing, a concentriccylinder in the casing forming an annular chamber between the cylinderand the wall of the casing, a pluralitv ol disks below the cylinderspaced said casing having an air inlet, a piston fitting the annularchamber and adapted to cut otl' the space between the disks, said diskshaving central openings and inclined upwardly projecting flanges aroundsaid openings, a liquid supply pipe communicating with the center of thelowermost. disk, and a trolling the outlet from-said liquid supply pipe.substantially as described.

10. A vcarbureter comprising u cylindrical casing. a concentric cylinderin the easing forming an annular chamber between the cylinder and thewall of the casing, a plurality of disks below the cylinder spa-cedapart and con'nnunicating with the casing, said casing having an airinlet, a.piston titting the annular chamber and adapted to cut off thespace between the disks, said disks hawing central openings and inclinedupwardly projecting flanges around said openings, the lowermost disksclosest together, and the disks above spaced from vthose below inrelative ratio, .the smallest spa-ces being between vthe lower disks andthe largest spaces between the upper disks, a. liquid supply pipecommunicating with the center of the lowermost disk, and a needle valvecarried b v the piston and controlling the outlet from said liquidsupply pipe, substantially as described.

1.1. AA carbureter comprising a c lindrical casing, a concentric cyinder in t e casing crming an annular.- chamber between the cylinder andthe wall of the casing, a plurality of disks below the cylinder spacedapart and communicating withthe casing. said casing having an air inlet.a piston titting the annular chamber and adapted to cut 4oil the spacebetween the disks. said disks liiving central openings and inclinednpwardly projecting flanges around said openings. the opening in the-lowest disk being smallest and in the upper disk largest, and theopeningsY in the disks between the upper and the lower disksvaryinginsize in regnlar ratio. a liquid supply pipe communicating withthe center of the. lowermost disk, and a needle valve carried by thepiston and controlling the outlet from said liquid supply pipe,substantially as described.

l.Y earbureter comprisinga cylindrical casing. a concentric cylinder inthe casing forming an annular chamber between .the

cylinder and the wall of`thecasing. a plu rality of disks below thecylinder spaced apart and communicating with the casing. said casinghaving an air inlet, a piston itting the annular chamber and adapted tocut i ofl1 the space between the disks, vsaid disks apart andcommunicating with the casing,

needle valve carried by the piston and conlof! '1 those below' by-increasing amount s, the

having central openings and inclined upsmallest spaces' being betweenthe lower wardly projecting flangesaround sa-id-opendisks and thelargest spaces between the upings, the lowermost disks closest together,per disks, a liquid supply pipe communicatand the disks above spacedfrom those below ing with the center of the lowermost disk,

by increasing amounts, the smallest spaces saidcylinder havingslots inits opposite being between the lower disks and the largest walls, a barprojected through said slots spaces between the upper disks, the openingand secured to the piston, and a needle valve inrthe lowest disk being'smallest and in the secured centrally to the bar and controlling ,upperdisk largest, and the openings in the the outlet of liquid from thesupply pipe, disks between the upper-'and the lower disks substantiallyas described. 75 varying in size in' regular ratio,.a liquid 16. .learbureter coniprising a cylindrical supply pipe communicating with' thecenter easing, a concentric cylinder in the casing of thelowermostdisk,and a needle valve forming an annular chamber between the carried by'the piston and controlling the' cylinder and the wall of the casing, apluoutlet from said liquid sllpply'pipe, substanrality of disks belowthe cylinder spaced 80 t-ially as described.. l apart and communicatingwith the casing,

13. A carbureter comprising a cylindrical said casing having an airinlet, a piston fitcasing, a concentric cy inder in the casing ting theannular chamber and adapted to forming' an annular 'chamber Abetween theeut off the space between the disks, said cylinder and the wall ofthecasing, a pludisks'"having central openings and inclined 85 rality ofdisks below lthe cylinder spaced upwardly projecting flanges around saidapart and communicating with the casing, openings, the opening inthelowest disks said casing having an air inlet, a piston-fit beingsmallest and in the upper disk largest, `ling' the annular'chamber andadapted to cut and the openings in Vthe disks between the oil the spacebetween tnedisks, a liquid supupper and the lower disks varying in size,9o ply pipe communicating with the'center 0f in regular ratio, a liquidsupply pipe cornthe lowermost disk, said -cylinder having municatingwith the center of the lowermost slots in its oplpositc walls, a. bar.projected disk, said cylinder having slots `in`its oppotb rough said sots and secured to the piston, site walls, a bar proj ectedA throughsaid slots and a needle valve secured centrally to the and vsecured tothe piston, and a: needle valve bar and controllin the outletlof liquidfrom secured centrally to the bar and controlling the supply pipe, sustantially as described. the outlet of liquid from the supply pipe,

14. A carbureter com rising a. cylindrical substantially as described.easing, a concentric cy inder in the casing 17; A carbureter comprisinga cylindrical l forming an annular chamber between the casing, aconcentric cylinder in the casing -100 cylinder and the wall of thecasing,l a pluforming an annular chamberV between the rality of disksbelow the cylinder spaced cylinder and'the wall -of the casing, a pluyapart and communicating with the easing', rality of disks below thecylinder spaced said casing having anlair inlet, a piston 4apart andcommunicating withthe casing, fitting the annular chamber and adapted tosaid casing having an air inlet, a piston f iteut oil' the space betweenthe disks, said disks ting the annular chamber and adapted to havingcentral openings and inclined up cut off the space between the disks,said wardly 'projecting' flanges aroundsaid opendisks having centralope'nings and inclined ings, a liquid supply pipe communicating upwardlyprojecting flanges around said 'with the center of the. lowermost disk,said openings, the lowermost disks closest to- 110 vlinder having" slotsin its opposite walls, gether, and the disks above spaced from a barprojecte through saidxslots and se# those belo\v by, increasing amounts,the cured to the piston, and a needle valve sesmallest spaces beingbetween the lower lcured centrally to the bar and controlling disks andthe largest s'p'aces between the upthe outlet of liquid'from the supplypi', e, per disks, the opening inthe lowest diskbe- 115 substantially asdescribed. i ng smallest and in the upper largest, and

15. A earbureter comprising a cylindrical the openings in the disksbetween the upper easing, a concentric cylinder in .the casing and thelower disks varying in size-'inreguforming al1-annular chamber betweenthelar ratio, a liquid supply pipel communicatcylinder and the wall ofthe casing, a 'pluling with the center of theflowermost disk, '120rality of disks below the cylinder spaced said cylinder having slotsin,its opposite' apart and communicating with the easing, walls, a barprojected through 'said' slots .said easing having an air inlet, apiston titand secured to the piston, and a -needle valve ting theannular chamber 'and adapted to secured c'htrlly to the bar andcontrolling cut off the space between the disks'said the'outlet ofliquid from the supply pipe,4 125 disks having central openingsandinclined substantially as described. upwardly projecting -flangesaround said 18. A carbureter comprising a cylindri' openings. thelowermost disks closest tocal casing, a concentriccylinder i'n-thecasgether. and the disks above spaced from `ingformi'ng an annularchamber.' between;

the cylinder and-thewall of the casing, 130

'plurality of disks below the cylinder spaced apart and communicatingrwith the casing, said casing having an air inlet, a piston fit ting theannular chamber and adapted to 1 cut off the space between the disks, acircular boss on thc bottom of said casing below the disks of the samediameter as the disks and the cylinder, and against which said piston isadapted to bear to cut ofi1 the flow of air to "he disks, substantiallyas described.

19. A .garbureter comprising a cylindrical casino, a concentric cylinderin the casing forming an annular chamber between the cylinder' and thewall ot' the casing, a plu. rality of disks below the cylinder spacedapart and communicating with the casing, said casing having an airinlet, a piston fit;v

ting the annular chamber and adapted toi cut off the spa between thedisks, said disks having central openings and inclined upwardlyprojecting flanges around said openings, a circular boss on the bottomof said casing below the disks ot the same diameter as the disks and'the cylinder, and against which said piston is adapted to bear to cutoff the flow of air to the disks, substantially as described.

20. A carbureter comprising a cylindrical casing, a concentric cylinderin the casingr i forming an annular chamber between thecylinder and thewall of the casing, a plurality of disks below the cylinder spaced apartand communicating with the casing, said casing having an air inlet, apistou fitting the annular chamber and adapted to l cut off the spacebetween the disks, said disks i having central openings and inclinedupwardly projecting 'flanges around said opcng ings, the lowermost disksclosest together,I

and the disks above spaced from those below by increasing amounts, thesmallest spaces being between the lower disks and the largest spacesbetween the upper disks, a l circular boss on the bottom of said casing5 below the disks of the same diameter-'as the disks and the cylinder,and aga-inst whicli said piston is adapted to bear to cut off the flowof air to the disks, substantially as described.

21. A carburetor comprising a cyli drcal casing, a concentric cylinderin vtheicasing forming an annular chamber between the cylinder and thewall of the casing, a plurality of disks below the cylinder ispacedapart and communicating with the casing, i

said casing having an air inlet, ay piston fittingthe annular chamberand adapted to cut oif the space between the disks, said disks havingcentral openings and inclined upwardly projecting flanges around saidopenings, the opening in the lowest disk being smallest and in the upperdisk largest, and the openings in the disks between the upper and thelower disks varying in size in regular ratio, a circular boss on thebotsaine diameter as the disks and the cylinder,-

and against which said piston is adapted to bear to cut off the flow ofair to the disks, substantially as described.

2Q. A carbureter comprising a cylindrical casing, a concentric cylinderin the casing forming an annular chamber between the cylinder and thewall of the casing, a plurality of disks below the cylinder spaced apartand communicating with the casing, said casing having an air inlet, apiston fitting the annular chamber and adapted t0 cut oit the spacebetween the disks, said disks havingr central openings and inclinedupwardly projecting flanges around said openings, the lowermost disksclosest together, and the disks above spaced from those below byincreasing amounts the smallest spaces being between the lower disks andthe largest spaces between the upper disks, the openingV in the lowestdisk being smallest andin the upper disk largest, and the openings inthe disks between the upper and the lower disks varying in size i inregular ratio, a circular boss on the bot- `r tom of said casing belowthe disks of the same diameter as the disks and the cylinder, andagainst which said piston is adapted to bear to cut off the low of airto the disks, substantially as described.

23. A carbureter comprising a cylindrical casing, a concentric cylinderin the casing forn'iing an annular chamber between the cylinder and thewall of the casing, a plurality of disks below the cylinder spaced apartand communicating with the casing, said casing having an air inlet, apiston fitting the annular chamber and adapted to cut off the spacebetween the disks, a liquid supply pipe communicating with the center ofthe lowermost disk, said cylinder having slots in its opposite wall, abar projected through said slots and secured to the piston,

ward and away from the valve, subai/tially as described. f,

24. A carbureter comprising/a/cylindrical casing, a concentric cylinderin the casing ,forming an annular chamber between thc cylinder and thewall of the casing, a plurality of disks below thecylinder spacedapart-and communicating with the casing,

said casing having an air inlet, a piston fitting the annular chamberand adapted to cut off the space between the disks, said disks havingcentral openings and inclined by increasing upwardly projecting flangesaround said openings, a liquidsupply pipe communicating with the centerof the lowermost disk,

sald cylinder havingslots in its oppositel Walls, a bar projected throu0rh said slots and secured to the piston, a needle valve secured icentrally to the bar and controlling the outthreads of the supply pipe,and means for turning said nut whereby the suppl pipe is substantiallyas described` openings iri the disks between the upper and the lowerdisks varying in size in regular rato,/a. liquid supply ipecommunicating with the center of the owermost disk, said cylinder havinslots in its opposite Walls, bar projected t lrough said slots andsecured to the piston, a needle valve secured centrally to the bar andcontrolling the outlet of liquid from the supply pipe, said supply pipeexternally screw-threaded, a nut swiveled in the bottom of said casingand having internal screw-threads engaging the threads A K n 5 of thesupply pipe, and means for turning adjusted toward and away from tie`valve, i

25. A carbureter comprisinga c lindrical casing, a concentric cylinderin tie casing forming an annular chamber between the cylinder and thewall of the casing, a plurality of disks below the cylinder spaced apartand communicating with the casingM said casing having an air inlet, apiston fitting-the annularchamber and adaptedl to i cut off the spaceshet een the disks, said disks t having central openings and inclinedupwardly projecting flanges around said openj' ings, Ythe lowermostdisks closesttogether,

and the disks above spaced from those below amounts, the smallest spacesbeing between the lower disks and the largest spaces between the upperdisks, a liquid supply pipe-communicating with the center of thelowermostdisk, said cylinder having slots in its opposite walls,a barprojected through said slots and Secured to the piston, a needle valvesecured centrally to the bar and controllingthe outlet of liquid fromthe supply pipe, said supply pipeexternally screw-threaded, a nutswiveled in the bottom of said casing and having internal screw-threadsengaging the threads of the supply pipe, and means for turning said nutwhereby the supply pipe is adjusted toward and away from the valve,substantially as described.

26. A carbureter comprising a cylindrical casing, a concentric cylinderin the easing forming an annular chamber bctweeithe cylinder and thewall ol the casing, a plu rality of disks below the cylinder sparedapart and con'nnunicating with the casing, said casing having an airinlet, a piston fitting the annular chamber and adapted to cut olf thespace between the disks, said disks having central openings and inclinedupwardly projecting flanges around said openings, the opening in thelowest disks being smallest and in thc upper disk largest., and the saidnut whereby the supply pipe is adjusted toward and away from the valve,substantially as described.

2-7. A carburetor comprising a cylindrical casing, a concentric cylinder`in the casingl forming an annular chamberbetween the cylinder and thewall of the casing, a plurality of disks below the cylinder spaced apartand communicating with the casing, said casing having an air inlet, apiston titting the annular chamber and adapted to cut olf the spacebetween the disks, said disks having central openings and inclined upwardly projecting flanges around said openin\gsthe,lowermost disksclosest together,

and/the/disks above spaced 'from those below in relative ratio, thesmallest spaces being between the lower disks and the largest spacesbetween the upper disks, the opening in the lowest disk being smallest,and in the upper disk largest., and the openings in the disks betweenthe upper and the lower disks varying in size in regular ratio, a liquidsupply pipe communicating with the center of the lowerxnost disk, saidcylinder having slots in its opposite walls, a bar projected throughsaid slots and secured to the piston`I a needlevalve' secured centrallyto the bar and controlling the outlet of liquid from the supply pipe,said supply pipe externally screw-threaded, a nut swiveled in the bottomof said casing and having internal screw threads engaging the threads ofthe supply pipe, and means for turning said nut, whereby the supply pipeis adjusted toward ,and away from the valve, substantially as described.

ln testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

R. H. KRENKEL, Cnas. E. Po'rrs.

